초록 ▼

A joinder of thermoplastic pipes. Current is passed through a coil disposed between the pipes while a clamp is applied to the joinder. The clamp exerts a prevailing force. The coil is rotatable to facilitate alignment of its leads. The current from a power supply is preferably applied for the same t

A joinder of thermoplastic pipes. Current is passed through a coil disposed between the pipes while a clamp is applied to the joinder. The clamp exerts a prevailing force. The coil is rotatable to facilitate alignment of its leads. The current from a power supply is preferably applied for the same time period for all joinder sizes, the current being adjusted to provide correct heat for various sizes.

대표청구항 ▼

A telescopic joinder for the ends of a pair of pipes made of rigid thermoplastic material which material is fusible by applied heat to enable surfaces of such material to fuse together when heated sufficiently to remain fused together after they have cooled, said joinder comprising: a receptacle in

A telescopic joinder for the ends of a pair of pipes made of rigid thermoplastic material which material is fusible by applied heat to enable surfaces of such material to fuse together when heated sufficiently to remain fused together after they have cooled, said joinder comprising: a receptacle in one end of one of said pipes having an internal wall; an outer wall adjacent to the end of the other of said pipes, said walls being telescopically fitted and aligned; a heating coil disposed between said walls to heat them, said coil having a pair of leads extending from said joinder; a clamp encircling said joinder in alignment with said walls and coil, and including spring means adapted to exert a prevailing compressive force on said joinder to press said walls together while being heated and to maintain said force substantially undiminished while being heated and cooled, said clamp further including a pair of strap segments releasably joined to one another enabling them to be separated to embrace the joinder, and to be connected together to exert said prevailing force.